People are now allowed to travel across Scotland to meet in groups of up to six adults from six households in outdoor settings.
Travel on trains is also no longer restricted to essential journeys only.
ScotRail said measures introduced across the network – including enhanced cleaning, one metre physical distancing and a legal requirement to wear face masks – should allow customers to travel with confidence if they do decide to take the train.
However, passengers are being asked to play their part by not travelling should they feel unwell or have a temperature and to avoid travel during the main commuting times, 7am to 9am and 4pm to 6.30pm, wherever possible.
The number of ScotRail services is currently around 65 per cent of pre-pandemic levels, while delivering 72 per cent of seats.
The train operator will be increasing the number of services from Sunday, May 16. On potentially busy routes, particularly those serving coastal areas, the number of carriages will also be increased on key services to provide as much space for physical distancing as possible.
ScotRail is confident the current service levels provide enough space to accommodate the easing of restrictions, but is urging customers to plan ahead and, given the reduced timetable, check last train times to ensure they can get home.
David Simpson, ScotRail operations director, said: “We’re encouraging customers to check their journey well in advance and plan ahead to stay safe.”